I've had an SEA-TPA ticket for a while now. I've already bought up on the return leg but for some odd reason though I had not been receiving offers for the outbound to TPA (on either leg - SEA-ATL or ATL-TPA). Today, and now within the upgrade window, I'm being offered ATL-TPA for $168 (no offer for SEA-ATL). I got excited when I saw the $168 because I would have jumped for SEA-ATL-TPA at $168 in a heartbeat. But not $168 for ATL-TPA.